Drawing-in device for adhesive-applying machines for use in the manufacture of envelopes



Aug. 21 1923. 1,465,887

A. WINKLER ET AL DRAWING-IN DEVICE FOR ADHESIVE APPLYING MACHINES FOR USE IN THE MANUFACTURE OF ENVELOPES Filed Oct. 18. 1921 Patented Aug. 21,1923.

UNITED STATES Parent oFFicE.

' ALF-RED WINKLER AND MAX D'll'Iil'NEBIER, OF NEUWIED, GERMANY.

DRAWING-IN DEVICE FOR ADHESIVE-APPLYING MACHINES ron use IN THE MANU- FACTURE or ENvELorEs,

Application filed October 18, 1921. Serial No. 508,460.

To all whom it may concern:

Be it known that we, ALFRED WINKLER and MAX DGNNEBIER, citizens of the German Republic, residing at Rhine, -Germany, Rheinufer. 23 and Engcrser Landstrasse 46, respectively, have invented certain new and useful Improvements in Drawing-In Devices for Adhesive-Apply ing Machines for Use in the Manufacture of Envelopes, of which the following is a speci fication.

When combining an adhesive-applying machine intended for closing flaps of envelopes and operating after, the spreading-out method with a roller folding machine for the manufacture of the envelopes, an 'unobjectionableworking of the drawing-in apparatus is particularly important for obtaining a uniform breadth of the adhesive substance.

9 Drawing-in the sheets of paper must, with "such machines, so proceed that the sheets are being drawn-in by jerks, so that they, which overlap each other like roof-tiles, form a continuous Web of paper in which the rims of the closing flaps are distant one from the other by the breadth of the coating of the adhesive substance.

Such a drawing-in apparatus in the specification forming part of the United States application Serial Number 339,529, filed November 20, 1919, and

shown in Figures 5 and 6 of the drawing also forming part of said application. Drawing-in the sheets by jerks is effecte d in that apparatus by the roller segments 10 which co-operate with the roller 4 in the manner there described. If making use of such segments which have been known also already prior to filing the said application,

40 no drawbacks are experienced as long as the single sheets are to be drawn-in immediately in their whole length, without theone being placed upon the other; but if the sheets are to be drawn-in and placed upon one another by jerks, as is the case with the former apparatus in question, the followmg' drawbacks are met with: i

There is always one layer of sheets between the segments 10 and the'roller 4, thethick- Neuwied,-

is described ness of that layer varying corresponding to the size of the sheets. This whole layer of paper shall be transported, for a certain distinct length of way at every periodic rotation of the roller 4, the rotation lasting as long as the time of contact between the segments and the roller, and the length of that way depending chiefly upon the breadth-of the segments 10 and corresponding to the breadth of the layer of the adhesive substance. This transport by jerks for portions of way of equal lengths would succeed if the transport of the web of paper would always commence, as well as cease, exactly with the periodic rotation of the roller 4, but it has been found, and is also explainable if the rather considerable thickness of the layer of paper between the segments and the lower rollervis considered, that the rigid segments 10, owing to the pressure they exert upon the layer of paper, causethe web of paper to move before the roller '4 commences to rotate. In the same manner the motion of the paper continues when the roller 4 has already ceased to rotate, because also then a pressure of the segments upon the web of 75 paper exists, viz, until the segments have been moved completely o f'f the paper. There results thus an one-sided moment of motion, that is to say, which acts upon the web of the paper only from above, already before and 30 also after the periodic rotation of the roller 4, whereby displacements within the web of paper; are caused and the consequence of which is that the distance between the sheets, as well as the breadth of the layers of the adhesive substance upon the envelopes, becomes ununiform.

Furthermore, if rigid segments are employed, the periodically moved lower roller 4 which operates together with these segments, must be worked with the same rotary speed as said segments because, otherwise, displacements within the web of paper are unavoidable. From this, too great a speed for the periodic motion of the paper results whereby the uniformity and the security o'f-the transport is'impaired.

Finally, also the contrivances described" and shown in the United States application 339,529 above mentioned and having the ob the formation of puffs occurring, as a matter of course, between the roller pairs 1718 and 2021 after every periodic feed motion of the paper cannot be satisfactorily compensated from the permanently rotating roller pair to'the next feed motion. Even in the case of most exact determination of the circumferential speed of the roller pair 2021 there remain now and then small pufis which by and by summarize and grow as great as to cause troubles. Also as disturbing tensions in the paper between the roller pairs 20-21 and 1718 occur, the cause being the weight of the upper roller 20 and the positive driving means provided for it. This roller and its weightare not sensitive'to the tensions occurring in the paper Web and not varying according to the thickness of the paper to be worked, and cannot either adapt themselves to these influences, or yield to them.

The present invention now relates to a drawing-in apparatus, the combination and arrangement of parts of which, as well as its manner of operation, corresponds in general to the former United States application above mentioned; but in particular such changes have been made that the beforementioned drawbacks are overcome. In-

tead,of the rigid roller segments two fin gers are made use of, of which each has at its end an easily rotatable roll and which form the members that grasp the paper; they contact (as formerly the segments 10) with the roller 4 at every revolution during the idle running of the machine. As this contact could take place, theoretically, only at one point which would not be sufiicient to transport the paper. the fingers carrying the rolls are hinged to their hubs that are I located upon the shaft. and they are springsupporoted and provided with an adjustingdevice in such a manner that their roll-carrying ends are capable of performing any adjustable radial motionl Bythisis attained that they contact at each revolution with a certain distinct portio .of the circiimferen'ce of the rollpr 4:. king use of. the rolls mentioned Instead of the rigid segments offers the advantagethat the} web of paper present betweengthem and the lower roller 4 can" be moved only if this roller rotates because in this case the rollers I and the roll form so-to-say a pair of tongs which gras theiivebpf paper and ull 1t forward. ff, p

however, the lower roller stands still,.the rollers moved over the web of pa er rotate upon the fingers, and in rollraeaee'r ing along the web they cannot displace either this latter" as a whole, or any one of the individual sheets forming it. Every tively, which latter place the tip of the W sheet down upon the roller 4: and grasp it and the roller in common anddraw the sheet off the pile for a certain length of way, The sucking member/ now fetches the next sheet and places it upon the preceding one.

When drawing-out this latter sheet, all pre-' I viously drawn-in sheets are also moved for the same length of way so that also here a continuous web of paper is formed, in whichthe rims of the closing flaps of the individual sheets are equally distant one from the other. 7

By replacing the rigid segments byeasily movable rolls is also attained that the periodically moved lower roller 4, and tlll1S also the web of paper, may be iven alesser speed than that of the rolls. or this urpose care must be taken solely concerning the circumstance that during the duration of the periodical motion of the paper the loose rolls exert constantly a ressure against the web of paper to secure -y efiect the transport of this latter, and consequently;

a longer supporting surface for the web, of

papermust be provided th-ariithelower roller 4 offers. This is attained by arrang' ing a piece of sheet-metal in front 0f the lower roller 4. This piece is bent concentrically with respectto the path of the finger rolls and is adjustable with respect to ,them.

The web of paper runs firstoyerthisbent piece and only then. over the lower :roller 4.

The finger rolls may thus'press against the web of paper along the whole length of the curved portion of the piece of. sheet-metal,

.as well asnpon the web of pa r. Theperiod of the movement ofthe p per .need now no nore fall, within the short moment in which the rolls co-operate with the "flower roller, but it may extend over thewhole length of time, during which the rolls run over the sheet-metal piece and the lower roller.

The lastly mentioned drawback concerning disturbances between the last pair of rollers which is permanently move'd,. rollers of the drawing-in apparatus, has been obviated by substituting for the heavy, positively driven first permanently running Viz,

' left this latter.

In order to make our invention more clear, we refer to the accompanying drawing which shows, by way of example, one form of construction of a drawing-in apparatus embodying our invention. Figure 1 a side-View of this apparatus, and Figure 2 is a frontview of the lower roller, the drawing-in fingers, and some co-operating parts.

The sheets to be folded are placed upon the frame 1 (which is adjustable for the various sizes) in such a manner that the sucking member 8 is capable of bringing the tip of the lowermost sheet into the scope of the finger rolls 8.' A bent piece of sheetmetal 6 is so arranged thatthe sheets which the sucking-memberhas fetched down are compelled to adapt themselves to the curvature of that piece of sheet-metal. This is important because the? sheets which, on the one side, are alrea y grasped by the roller 4 and the rolls 16,-but, on the other side, .rest partly still under the pile, must always be ,maintained in uniform tension if an unobjectionable operationof the drawing-in device shall be attained. This is possible only if the sheets are compelled to assume a definitive position between the pile and the roller 4' which is brought about in'a compulsory way by laying the sheets against the highly vaulted portion ofthe piece of sheetr metal in question, This latter is at its uprollsa attached per end downwardly bent; viz,'in a circular curve running concentrically with the path of the rotating drawing-in finger e, and the them. Theobjectof these .contrivances wil be dealt with later. on.

The construction of the drawing-iii fingers c and of the rolls a which they carry is shown in Figure 2; The shafts rd which are located above the roller- 4 carry at their op-J posite inner ends the hub parts e, to which the drawing-in fingers are hinged. These are angularly formed; the easily rotatable rolls a are attached to the horizontal legs of the angles, andthe vertical legs are under the pressure of springs g; the pressure and the position of the rolls may be adjusted by screws 13.. Each of the shafts d carries, near to the hub part e, a loosely rotatable roll 16. 1 Also in, the construction shown and described in this specification the shafts d? with the drawing-in fingers o are in continuous rotation, whereas the roller 4 rotates periodically for such an extent that measured at its circumference the extent of the motion corresponds to the desired distance between the sheets, within the web of paper. The

sheet tips which the sucking member has.

fetched down are grasped by the rolls a, as

indicated in Figure -1. During the further rotation of the shafts d the rolls press the sheet tip at first against the upper bend of I the piece of sheet-metal b, and as this bend lies concentrically with the path of the,

rolls, the pressure of these latter upon the paper continues until the end of that piece.

As, furthermore, the rolls'a proceed from the piece of sheet-metal I) immediately to the roller 4, and, besides, also the paper lies against this roller, the pressure co'ntiiiues also at this lace. As long as the roller stands still, a S0 the web of'paper remains at rest, but every motion of the roller 4 is at once transmitted 'to the web of paper because this, as soon as less sheets have been drawn in, lies between the roller 4 and the loose rolls '16.,

The finger rolls a which press that sheet which the sucking member has lastly conveyedfagainst the web of paper are, owing to their easy revolubility, only then in the position to move-the said sheet (or anyo'f the subsequent sheets), when the web, of paper; is in motion, because they, if the web of 'paper is at rest, can make only a relative motion of their own.

The bend of the piece of sheet-metal a which extends concentrically to the pathbf the rolls a is important from. the following reason? M The rolls a, besides having to fetch down the ,newly arriving sheet, have to convey (solely) also the sheets that have not yet ar- This, however, is possible only if a solid base, such asformed by the roller 4 and the piece ofsheet-metal b, is provided for the web of paper. If only the roller 4 would be employed as such a base,.one would be compelled to move the web of paper inthe short time infwhich the rolls 'wcontact with the roller 4, and the jerk-wis,e rotation of the roller 4 should; then, proceed with about the same peripheral speed as have the un1nterruptedly rotating drawing-1n fingers. This is the case also with the formerly employed rigid segments where these latter and the roller 4 have the same peripheral speed which, however, concerning the periodical motion of the roller 4 has proved too high because the secur y and the uniformity rived below the rolls 16. Thus, care must a I of the periodical feed of the paper is thereby impaired.

' Concerning, hdweverfthe present invention one is in the position to decrease greatly the jerk-wise motion of the roller 4. The rotation of this roller may commence already shortly after the rolls ahate pressed the sheets against the piece of sheet-metal b, and it 'need'ceasc only shortly before t e rolls leave the web of paper above the rol er 4;,. CA by far greater security and uniformity ,of the periodical feed of the paper is thereby warranted. Whilst, where rigid seg ments are made use of, equal speed of the segments and the lower roller is a fundamental condition, there may be, if the finger rolls are employed, differences of speed of any magnitude, because the difference is automatically completely compensated by the possible relative motion of the rolls.

Between the first lower roller 2 1-which permanently rotates and the drum 25 is a table-like connection Over the drum 25,

the roller 21, and the-table 2', runs, in the middle portions of these parts, a strap 70, which, in connection with the loose roll Z, receives the periodically fed web of paper. The roll Z is displaceable in the longitudinal direction'of the machine and may be adjusted with respect to the size ofthe sheets,

' in such a manner, that it grasps the tip of a sheet just when the preceding periodically 7 running rollers are liberating it.

Having "now described our invention, what we desire to secure by a Patent of the UnitedStates is:

1. A drawing-in device of the kind in 1 tended for adhesive-applying machines cooperating with roller folding machines for use in themanufacture of envelopes, comprising, in combination, a sucking member;

" a periodically rotated lower roller; a loosely rotatable drawing-in roll adapted, to revolx e like a crank; a member, to the outer end of i which said roll is attached; a hub portion 7 having said member hinged to it; and

.means to limit the extent. of motion of the said member in outward direction, substantially as described.

2. A drawing-in device of the kind intended for adhesive-applying machines cooperating with rollerfoldin machines for use in the manufacture of enveldilies, comprising, in combination, a, sucking. inember;

a periodically rotated lower roller; a loosely rotatable drawing-in roll adapted to revolve like a crank; a piling frame; a piece of sheet-metal forming a continuation of the base of said frame and extending closely to, the path of said roll and being bent at its end in a circular curv extending concentrically to' saideroll path, substantially as described. K

3. A drawing-in device of the kind intended for adhesive-applying machines 00- ,which said roll is attached; a hub portion necessaoperating with roller folding machines for use in the manufacture of envelopes,v comprising, in combination, a sucking member; a periodically rotated lower roller; loosely rotatable drawing-in rolls adapted 'each to revolve like a crank; members, to the outer ends of which said rolls are attached; hub portions having said members elastically hinged to them; a piling frame; a piece of sheet-metal forming'a continuation of the base of said piling frame and extending closely to'the path of said rolls and being bent at its endin a circular curve extending concentrically to said roll path; substantially as described. I

4-. A drawing-in device of the kind intended for adhesive-applying machines cooperating with roller folding machines for. use in the manufacture of envelopes, co-mprising, incombination, a sucking member; a loosely running roll adapted to be adjusted in the longitudinal direction of the machine and forming the first permanently running upper roller of the machine; a strap co-operating with said roll; a periodically rotated lower roller a loosely rotatv able drawing in roll adapted to revolve like a crank; a member, to the outer end of having said member hinged to it; and means to limit the extent of motion of the said member in outward direction, substantially as described. 51A drawing-in device of the kind intended for adhesive-applyingmachines 00- operating with roller folding machines for use in the manufacture of envelopes, comprising, in combination, a sucking member; a loosely running roll adapted to be adjusted in'the longitudinal direction of the machine and forming the first permanently running upper, roller of the machine; a strap co-operating with said roll; a periodically rotated lower roller; a loosely rotated drawing-in roll adapted to revolve like a crank; a piling \frame'; a piece oftsheetmetal forming a continuation of the base of said frame, and extending closely to the path of said roll and being bent at its end in a circular curve extending concentrically to said roll path, substantially as descrlbed.

6. A drawing-in device of the kind intended for adhesive-applying machines cooperating with'roller folding machines for use in the manufacture of envelopes, comprising, ,in combination, a sticking member;

a loosely running roll adapted to be ad- 'justed in the longitudinal direction of the machine and forming the first permanently running upper roller of the machine; a strap 'co-operating with said roll; a periodically rotated flower roller; loosely rotatable drawing-in, rolls fiadapted each to revolve like aciagk; members, to the outer ends of i which sai' are attached; hub portions having said members elastically hinged to 'In testimony whereof We afiix our signathem; a piling frame; a piece of sheet-metal tures in the presence of two Witnesses. forming a continuation of the base of said ALFRED WINKLER. piling frame and extending closely to the MAX DI'jNNEBIER '5 path of'said rolls and being bent at its end Wit in a circular curve extending concentrically FR. YOZTMANN. to said roll path; substantially as described. G. EAsKE. 

